Costly neighbours: Heterospecific competitive interactions increase metabolic rates in dominant species

Abstract The energy costs of self-maintenance (standard metabolic rate, SMR) vary substantially among individuals within a population. Despite the importance of SMR for understanding life history strategies, ecological sources of SMR variation remain only partially understood. Stress-mediated increa...

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Autores principales:	Matouš Janča, Lumír Gvoždík
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c447bb9ea84e4b0fb9e2fec0a63969de
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spelling	oai:doaj.org-article:c447bb9ea84e4b0fb9e2fec0a63969de2021-12-02T11:52:28ZCostly neighbours: Heterospecific competitive interactions increase metabolic rates in dominant species10.1038/s41598-017-05485-92045-2322https://doaj.org/article/c447bb9ea84e4b0fb9e2fec0a63969de2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05485-9https://doaj.org/toc/2045-2322Abstract The energy costs of self-maintenance (standard metabolic rate, SMR) vary substantially among individuals within a population. Despite the importance of SMR for understanding life history strategies, ecological sources of SMR variation remain only partially understood. Stress-mediated increases in SMR are common in subordinate individuals within a population, while the direction and magnitude of the SMR shift induced by interspecific competitive interactions is largely unknown. Using laboratory experiments, we examined the influence of con- and heterospecific pairing on SMR, spontaneous activity, and somatic growth rates in the sympatrically living juvenile newts Ichthyosaura alpestris and Lissotriton vulgaris. The experimental pairing had little influence on SMR and growth rates in the smaller species, L. vulgaris. Individuals exposed to con- and heterospecific interactions were more active than individually reared newts. In the larger species, I. alpestris, heterospecific interactions induced SMR to increase beyond values of individually reared counterparts. Individuals from heterospecific pairs and larger conspecifics grew faster than did newts in other groups. The plastic shift in SMR was independent of the variation in growth rate and activity level. These results reveal a new source of individual SMR variation and potential costs of co-occurrence in ecologically similar taxa.Matouš JančaLumír GvoždíkNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-6 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Matouš Janča Lumír Gvoždík Costly neighbours: Heterospecific competitive interactions increase metabolic rates in dominant species
description	Abstract The energy costs of self-maintenance (standard metabolic rate, SMR) vary substantially among individuals within a population. Despite the importance of SMR for understanding life history strategies, ecological sources of SMR variation remain only partially understood. Stress-mediated increases in SMR are common in subordinate individuals within a population, while the direction and magnitude of the SMR shift induced by interspecific competitive interactions is largely unknown. Using laboratory experiments, we examined the influence of con- and heterospecific pairing on SMR, spontaneous activity, and somatic growth rates in the sympatrically living juvenile newts Ichthyosaura alpestris and Lissotriton vulgaris. The experimental pairing had little influence on SMR and growth rates in the smaller species, L. vulgaris. Individuals exposed to con- and heterospecific interactions were more active than individually reared newts. In the larger species, I. alpestris, heterospecific interactions induced SMR to increase beyond values of individually reared counterparts. Individuals from heterospecific pairs and larger conspecifics grew faster than did newts in other groups. The plastic shift in SMR was independent of the variation in growth rate and activity level. These results reveal a new source of individual SMR variation and potential costs of co-occurrence in ecologically similar taxa.
format	article
author	Matouš Janča Lumír Gvoždík
author_facet	Matouš Janča Lumír Gvoždík
author_sort	Matouš Janča
title	Costly neighbours: Heterospecific competitive interactions increase metabolic rates in dominant species
title_short	Costly neighbours: Heterospecific competitive interactions increase metabolic rates in dominant species
title_full	Costly neighbours: Heterospecific competitive interactions increase metabolic rates in dominant species
title_fullStr	Costly neighbours: Heterospecific competitive interactions increase metabolic rates in dominant species
title_full_unstemmed	Costly neighbours: Heterospecific competitive interactions increase metabolic rates in dominant species
title_sort	costly neighbours: heterospecific competitive interactions increase metabolic rates in dominant species
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/c447bb9ea84e4b0fb9e2fec0a63969de
work_keys_str_mv	AT matousjanca costlyneighboursheterospecificcompetitiveinteractionsincreasemetabolicratesindominantspecies AT lumirgvozdik costlyneighboursheterospecificcompetitiveinteractionsincreasemetabolicratesindominantspecies
_version_	1718395068907257856

Costly neighbours: Heterospecific competitive interactions increase metabolic rates in dominant species

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